摘要：The coloring matter of naphthoresorcinol reaction with glucuronic acid was shown to consist of two main dyes, one of which was isolated by the present authors. The new dye was supposed to change to the Ogata and Nozaki's dye at a higher temperature or by a longer reaction time by hydrochloric acid. The newly presented structure of the dyes may explain all the analytical data and the reaction mechanism.
